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https://www.readbyqxmd.com/read/28342791/endocardial-pacing-in-infants-and-young-children-weighing-less-than-10%C3%A2-kilograms
#1
Aldo Campos-Quintero, José Antonio García-Montes, Rubén Cruz-Arias, Carlos Zabal-Cerdeira, Juan Calderón-Colmenero, Juan Pablo Sandoval
No abstract text is available yet for this article.
March 22, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28340317/opportunities-for-crash-and-injury-reduction-a-multi-harm-approach-for-crash-data-analysis
#2
Ann Mallory, Allison Kender, Kevin Moorhouse
OBJECTIVE: A multi-harm approach for analyzing crash and injury data was developed for the ultimate purpose of getting a richer picture of motor vehicle crash outcomes identifying research opportunities in crash safety. METHODS: Methods were illustrated using a retrospective analysis of 69,597 occupant cases from NASS CDS (National Automotive Sampling System Crashworthiness Data System) from 2005 to 2015. Occupant cases were analyzed by frequency and severity of outcome: fatality, injury by AIS (Abbreviated Injury Scale), number of cases, attributable fatality, disability, and injury costs...
March 24, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28340033/inappropriate-inhibition-of-biventricular-pacing-due-to-diaphragmatic-myopotentials-amplified-by-the-selectable-sensing-filter
#3
Kenichi Iijima, Naoko Ishida, Daisuke Izumi, Tohru Minamino
No abstract text is available yet for this article.
March 13, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28340026/high-rate-of-subcutaneous-implantable-cardioverter-defibrillator-sensing-screening-failure-in-patients-with-brugada-syndrome-a-comparison-with-other-inherited-primary-arrhythmia-syndromes
#4
Giulio Conte, Mihoko Kawabata, Carlo de Asmundis, Erika Taravelli, Francesco Petracca, Diego Ruggiero, Maria Luce Caputo, François Regoli, Gian-Battista Chierchia, Alessandra Chiodini, Alessandro Del Bufalo, Tiziano Moccetti, Masahiko Goya, Kenzo Hirao, Alessandro Vicentini, Gaetano M De Ferrari, Pedro Brugada, Angelo Auricchio
Aims: Subcutaneous implantable cardioverter-defibrillator (S-ICD) can avoid important complications associated with transvenous leads in patients with inherited primary arrhythmia syndromes, who do not need pacing therapy. Few data are available on the percentage of patients with inherited arrhythmia syndromes eligible for S-ICD implantation. Aim of this study was to analyse the eligibility for S-ICD in a series of patients with Brugada syndrome (BrS), and to compare it with patients with other channelopathies...
March 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339945/single-site-ventricular-pacing-via-the-coronary-sinus-in-patients-with-tricuspid-valve-disease
#5
Amit Noheria, Martin van Zyl, Luis R Scott, Komandoor Srivathsan, Malini Madhavan, Samuel J Asirvatham, Christopher J McLeod
Aims: To evaluate coronary sinus single-site (CSSS) left ventricular pacing in adult patients with normal left ventricular ejection fraction (LVEF) when traditional right ventricular lead implantation is not feasible or is contraindicated. Methods and results: We performed a retrospective analysis of 23 patients with tricuspid valve surgery/disease who received a CSSS ventricular pacing lead to avoid crossing the tricuspid valve. Two matched control populations were obtained from patients receiving (i) conventional right ventricular single-site (RVSS) leads and (ii) coronary sinus leads for cardiac resynchronization therapy (CSCRT)...
March 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339750/downstream-overdrive-pacing-and-intracardiac-concealed-fusion-to-guide-rapid-identification-of-atrial-tachycardia-after-atrial-fibrillation-ablation
#6
Chirag R Barbhaiya, Samuel H Baldinger, Saurabh Kumar, Jason S Chinitz, Alan D Enriquez, Roy John, William G Stevenson, Gregory F Michaud
Aims: Atrial tachycardia (AT) related to atrial fibrillation (AF) ablation frequently poses a diagnostic challenge. Downstream overdrive pacing (DOP) can be used to rapidly detect reentry and assess proximity of a pacing site to an AT circuit or focus. We hypothesized that systematic DOP using multielectrode catheters would facilitate AT mapping. Methods and results: DOP identified constant fusion when the post-pacing interval (PPI)-tachycardia cycle length (TCL) <40 ms and stimulus to adjacent upstream atrial electrogram interval >75% of TCL...
February 17, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339581/rationale-and-design-of-the-budapest-crt-upgrade-study-a-prospective-randomized-multicentre-clinical-trial
#7
Bela Merkely, Annamaria Kosztin, Attila Roka, Laszlo Geller, Endre Zima, Attila Kovacs, Andras Mihaly Boros, Helmut Klein, Jerzy K Wranicz, Gerhard Hindricks, Marcell Clemens, Gabor Z Duray, Arthur J Moss, Ilan Goldenberg, Valentina Kutyifa
Aims: There is lack of conclusive evidence from randomized clinical trials on the efficacy and safety of upgrade to cardiac resynchronization therapy (CRT) in patients with implanted pacemakers (PM) or defibrillators (ICD) with reduced left ventricular ejection fraction (LVEF) and chronic heart failure (HF). The BUDAPEST-CRT Upgrade Study was designed to compare the efficacy and safety of CRT upgrade from conventional PM or ICD therapy in patients with intermittent or permanent right ventricular (RV) septal/apical pacing, reduced LVEF, and symptomatic HF...
October 6, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339579/left-univentricular-pacing-for-cardiac-resynchronization-therapy
#8
Haran Burri, Frits W Prinzen, Maurizio Gasparini, Christophe Leclercq
This review describes the rationale and published evidence for left univentricular pacing for cardiac resynchronization therapy, gives an overview of the existing optimization algorithms featuring this mode, and discusses future perspectives.
October 6, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28338921/the-relationship-between-objectively-measured-walking-and-risk-of-pedestrian-motor-vehicle-collision
#9
D Alex Quistberg, Eric J Howard, Philip M Hurvitz, Anne V Moudon, Beth E Ebel, Frederick P Rivara, Brian E Saelens
Safe urban walking environments may improve health by encouraging physical activity, but the relationship between an individual's location and walking pattern and the risk of pedestrian-motor vehicle collision is unknown. We examined associations between individuals' walking bouts and walking risk, measured as mean exposure to the risk of pedestrian-vehicle collision. Walking bouts were ascertained through integrated accelerometry and global positioning system data and from individual travel-diary data obtained from adults in the Travel Assessment and Community Study (King County, Washington) in 2008-2009...
March 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28337646/the-puzzle-of-study-time-allocation-for-the-most-challenging-items
#10
Monika Undorf, Rakefet Ackerman
Learners often allocate more study time to challenging items than to easier ones. Nevertheless, both predicted and actual memory performance are typically worse for difficult than for easier items. The resulting inverse relations between people's predictions of their memory performance (judgments of learning; JOLs) and self-paced study time (ST) are often explained by bottom-up, data-driven ST allocation that is based on fluency. However, we demonstrate robust inverted U-shaped relations between JOLs and ST that cannot be explained by data-driven ST allocation alone...
March 23, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28337437/bioengineering-approaches-to-mature-human-pluripotent-stem-cell-derived-cardiomyocytes
#11
REVIEW
Xuetao Sun, Sara S Nunes
Human pluripotent stem cell-derived cardiomyocytes (hPSC-CM) represent a potential unlimited cell supply for cardiac tissue engineering and possibly regenerative medicine applications. However, hPSC-CMs produced by current protocols are not representative of native adult human cardiomyocytes as they display immature gene expression profile, structure and function. In order to improve hPSC-CM maturity and function, various approaches have been developed, including genetic manipulations to induce gene expression, delivery of biochemical factors, such as triiodothyronine and alpha-adrenergic agonist phenylephrine, induction of cell alignment in 3D tissues, mechanical stress as a mimic of cardiac load and electrical stimulation/pacing or a combination of these...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28336157/-prescription-of-acetaminophen-in-five-french-hospitals-what-are-the-practices
#12
Jean-Baptiste Pace, Viviane Nave, Mélanie Moulis, Magali Bourdelin, Sandra Coursier, Élodie Jean-Bart, Bertrand Leroy, Jean-Louis Bonnefous, Hervé Bontemps, Jérôme Coutet, Carine Eyssette, Emmanuelle Pont
AIM: Acetaminophen is widely used in hospital settings and often considered as nontoxic. We conducted a multicentric study in order to evaluate its proper use. METHOD: Prescriptions from five general hospitals were analyzed, according to dose adjustments required in renal or liver failure, weight or chronic alcoholism, determined using a literature review. Other criteria have been assessed: indication for parenteral access, accuracy of administration time and pain assessment...
February 22, 2017: Thérapie
https://www.readbyqxmd.com/read/28335863/zebrafish-in-toxicology-and-environmental-health
#13
Kathryn Bambino, Jaime Chu
As manufacturing processes and development of new synthetic compounds increase to keep pace with the expanding global demand, environmental health, and the effects of toxicant exposure are emerging as critical public health concerns. Additionally, chemicals that naturally occur in the environment, such as metals, have profound effects on human and animal health. Many of these compounds are in the news: lead, arsenic, and endocrine disruptors such as bisphenol A have all been widely publicized as causing disease or damage to humans and wildlife in recent years...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28335644/heart-rate-and-dyssynchrony-in-patients-with-cardiac-resynchronization-therapy-a-pilot-study
#14
Jan Naar, Lars Mortensen, Reidar Winter, Jonas Johnson, Kambiz Shahgaldi, Aristomenis Manouras, Frieder Braunschweig, Marcus Ståhlberg
OBJECTIVES: The objective of this pilot study was to describe the impact of paced heart rate on left ventricular (LV) mechanical dyssynchrony in synchronous compared to dyssynchronous pacing modes in patients with heart failure. METHODS: Echocardiography was performed in 14 cardiac resynchronization therapy (CRT) patients at paced heart rates of 70 and 90 bpm in synchronous- (CRT), and dyssynchronous (atrial pacing + wide QRS activation) pacing modes. LV dyssynchrony was quantified using the 12-segment standard deviation model (Ts-SD) derived from Tissue Doppler Imaging...
March 23, 2017: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/28335613/tightly-bound-soil-water-introduces-isotopic-memory-effects-on-mobile-and-extractable-soil-water-pools
#15
Sarah L Newberry, Ulrich E Prechsl, Matthew Pace, Ansgar Kahmen
Cryogenic vacuum extraction is the well-established method of extracting water from soil for isotopic analyses of waters moving through the soil-plant-atmosphere continuum. We investigate if soils can alter the isotopic composition of water through isotope memory effects, and determined which mechanisms are responsible for it. Soils with differing physicochemical properties were re-wetted with reference water and subsequently extracted by cryogenic water distillation. Results suggest some reference waters bind tightly to the soil and not all of this tightly bound water is removed during cryogenic vacuum extraction...
March 23, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28334532/an-ultrafast-switchable-terahertz-polarization-modulator-based-on-iii-v-semiconductor-nanowires
#16
Sarwat A Baig, Jessica L Boland, Djamshid A Damry, Hark Hoe Tan, Chennupati Jagadish, Hannah J Joyce, Michael B Johnston
Progress in the terahertz (THz) region of the electromagnetic spectrum is undergoing major advances, with advanced THz sources and detectors being developed at a rapid pace. Yet, ultrafast THz communication is still to be realised, owing to the lack of practical and effective THz modulators. Here, we present a novel ultrafast active THz polarization modulator based on GaAs semiconductor nanowires arranged in a wire-grid configuration. We utilise an optical pump--terahertz probe spectroscopy system and vary the polarization of the optical pump beam to demonstrate ultrafast THz modulation with a switching time of less than 5\,ps and a modulation depth of -8dB...
March 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28334438/insurance-denials-for-cancer-clinical-trial-participation-after-the-affordable-care-act-mandate
#17
Christine B Mackay, Kaitlyn R Antonelli, Suanna S Bruinooge, Jarron M Saint Onge, Shellie D Ellis
BACKGROUND: The Affordable Care Act (ACA) includes a mandate requiring most private health insurers to cover routine patient care costs for cancer clinical trial participation; however, the impact of this provision on cancer centers' efforts to accrue patients to clinical trials has not been well described. METHODS: First, members of cancer research centers and community-based institutions (n = 252) were surveyed to assess the status of insurance denials, and then, a focused survey (n = 77) collected denial details...
March 23, 2017: Cancer
https://www.readbyqxmd.com/read/28334383/a-critical-role-of-inhibition-in-temporal-processing-maturation-in-the-primary-auditory-cortex
#18
Dongqin Cai, Rongrong Han, Miaomiao Liu, Fenghua Xie, Ling You, Yi Zheng, Limin Zhao, Jun Yao, Yiwei Wang, Yin Yue, Christoph E Schreiner, Kexin Yuan
Faithful representation of sound envelopes in primary auditory cortex (A1) is vital for temporal processing and perception of natural sounds. However, the emergence of cortical temporal processing mechanisms during development remains poorly understood. Although cortical inhibition has been proposed to play an important role in this process, direct in-vivo evidence has been lacking. Using loose-patch recordings in rat A1 immediately after hearing onset, we found that stimulus-following ability in fast-spiking neurons was significantly better than in regular-spiking (RS) neurons...
March 1, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28334154/ethical-issues-of-crispr-technology-and-gene-editing-through-the-lens-of-solidarity
#19
John J Mulvihill, Benjamin Capps, Yann Joly, Tamra Lysaght, Hub A E Zwart, Ruth Chadwick
Background: The avalanche of commentaries on CRISPR-Cas9 technology, a bacterial immune system modified to recognize any short DNA sequence, cut it out, and insert a new one, has rekindled hopes for gene therapy and other applications and raised criticisms of engineering genes in future generations. Sources of data: This discussion draws on articles that emphasize ethics, identified partly through PubMed and Google, 2014-2016. Areas of agreement: CRISPR-Cas9 has taken the pace and prospects for genetic discovery and applications to a high level, stoking anticipation for somatic gene engineering to help patients...
February 23, 2017: British Medical Bulletin
https://www.readbyqxmd.com/read/28332231/development-of-humanized-mice-in-the-age-of-genome-editing
#20
Vishnu Hosur, Benjamin E Low, Cindy Avery, Leonard D Shultz, Michael V Wiles
Mice are the most commonly used model organisms to study human disease. Many genetic human diseases can be recapitulated by modifying the mouse genome, which permits testing of existing and novel therapeutics, including combinatorial therapeutics, without putting humans at risk. Specifically, the development of "humanized" mice, i.e., severely immunodeficient mice engrafted with functional human hematopoietic and immune cells and tissues, has revolutionized our ability to study and model human diseases in preclinical in vivo systems...
March 22, 2017: Journal of Cellular Biochemistry
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